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Diffstat (limited to 'middleware/node_modules/iconv-lite/encodings/dbcs-data.js')
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diff --git a/middleware/node_modules/iconv-lite/encodings/dbcs-data.js b/middleware/node_modules/iconv-lite/encodings/dbcs-data.js new file mode 100644 index 0000000..4b61914 --- /dev/null +++ b/middleware/node_modules/iconv-lite/encodings/dbcs-data.js @@ -0,0 +1,176 @@ +"use strict"; + +// Description of supported double byte encodings and aliases. +// Tables are not require()-d until they are needed to speed up library load. +// require()-s are direct to support Browserify. + +module.exports = { + + // == Japanese/ShiftJIS ==================================================== + // All japanese encodings are based on JIS X set of standards: + // JIS X 0201 - Single-byte encoding of ASCII + ¥ + Kana chars at 0xA1-0xDF. + // JIS X 0208 - Main set of 6879 characters, placed in 94x94 plane, to be encoded by 2 bytes. + // Has several variations in 1978, 1983, 1990 and 1997. + // JIS X 0212 - Supplementary plane of 6067 chars in 94x94 plane. 1990. Effectively dead. + // JIS X 0213 - Extension and modern replacement of 0208 and 0212. Total chars: 11233. + // 2 planes, first is superset of 0208, second - revised 0212. + // Introduced in 2000, revised 2004. Some characters are in Unicode Plane 2 (0x2xxxx) + + // Byte encodings are: + // * Shift_JIS: Compatible with 0201, uses not defined chars in top half as lead bytes for double-byte + // encoding of 0208. Lead byte ranges: 0x81-0x9F, 0xE0-0xEF; Trail byte ranges: 0x40-0x7E, 0x80-0x9E, 0x9F-0xFC. + // Windows CP932 is a superset of Shift_JIS. Some companies added more chars, notably KDDI. + // * EUC-JP: Up to 3 bytes per character. Used mostly on *nixes. + // 0x00-0x7F - lower part of 0201 + // 0x8E, 0xA1-0xDF - upper part of 0201 + // (0xA1-0xFE)x2 - 0208 plane (94x94). + // 0x8F, (0xA1-0xFE)x2 - 0212 plane (94x94). + // * JIS X 208: 7-bit, direct encoding of 0208. Byte ranges: 0x21-0x7E (94 values). Uncommon. + // Used as-is in ISO2022 family. + // * ISO2022-JP: Stateful encoding, with escape sequences to switch between ASCII, + // 0201-1976 Roman, 0208-1978, 0208-1983. + // * ISO2022-JP-1: Adds esc seq for 0212-1990. + // * ISO2022-JP-2: Adds esc seq for GB2313-1980, KSX1001-1992, ISO8859-1, ISO8859-7. + // * ISO2022-JP-3: Adds esc seq for 0201-1976 Kana set, 0213-2000 Planes 1, 2. + // * ISO2022-JP-2004: Adds 0213-2004 Plane 1. + // + // After JIS X 0213 appeared, Shift_JIS-2004, EUC-JISX0213 and ISO2022-JP-2004 followed, with just changing the planes. + // + // Overall, it seems that it's a mess :( http://www8.plala.or.jp/tkubota1/unicode-symbols-map2.html + + 'shiftjis': { + type: '_dbcs', + table: function() { return require('./tables/shiftjis.json') }, + encodeAdd: {'\u00a5': 0x5C, '\u203E': 0x7E}, + encodeSkipVals: [{from: 0xED40, to: 0xF940}], + }, + 'csshiftjis': 'shiftjis', + 'mskanji': 'shiftjis', + 'sjis': 'shiftjis', + 'windows31j': 'shiftjis', + 'ms31j': 'shiftjis', + 'xsjis': 'shiftjis', + 'windows932': 'shiftjis', + 'ms932': 'shiftjis', + '932': 'shiftjis', + 'cp932': 'shiftjis', + + 'eucjp': { + type: '_dbcs', + table: function() { return require('./tables/eucjp.json') }, + encodeAdd: {'\u00a5': 0x5C, '\u203E': 0x7E}, + }, + + // TODO: KDDI extension to Shift_JIS + // TODO: IBM CCSID 942 = CP932, but F0-F9 custom chars and other char changes. + // TODO: IBM CCSID 943 = Shift_JIS = CP932 with original Shift_JIS lower 128 chars. + + + // == Chinese/GBK ========================================================== + // http://en.wikipedia.org/wiki/GBK + // We mostly implement W3C recommendation: https://www.w3.org/TR/encoding/#gbk-encoder + + // Oldest GB2312 (1981, ~7600 chars) is a subset of CP936 + 'gb2312': 'cp936', + 'gb231280': 'cp936', + 'gb23121980': 'cp936', + 'csgb2312': 'cp936', + 'csiso58gb231280': 'cp936', + 'euccn': 'cp936', + + // Microsoft's CP936 is a subset and approximation of GBK. + 'windows936': 'cp936', + 'ms936': 'cp936', + '936': 'cp936', + 'cp936': { + type: '_dbcs', + table: function() { return require('./tables/cp936.json') }, + }, + + // GBK (~22000 chars) is an extension of CP936 that added user-mapped chars and some other. + 'gbk': { + type: '_dbcs', + table: function() { return require('./tables/cp936.json').concat(require('./tables/gbk-added.json')) }, + }, + 'xgbk': 'gbk', + 'isoir58': 'gbk', + + // GB18030 is an algorithmic extension of GBK. + // Main source: https://www.w3.org/TR/encoding/#gbk-encoder + // http://icu-project.org/docs/papers/gb18030.html + // http://source.icu-project.org/repos/icu/data/trunk/charset/data/xml/gb-18030-2000.xml + // http://www.khngai.com/chinese/charmap/tblgbk.php?page=0 + 'gb18030': { + type: '_dbcs', + table: function() { return require('./tables/cp936.json').concat(require('./tables/gbk-added.json')) }, + gb18030: function() { return require('./tables/gb18030-ranges.json') }, + encodeSkipVals: [0x80], + encodeAdd: {'€': 0xA2E3}, + }, + + 'chinese': 'gb18030', + + + // == Korean =============================================================== + // EUC-KR, KS_C_5601 and KS X 1001 are exactly the same. + 'windows949': 'cp949', + 'ms949': 'cp949', + '949': 'cp949', + 'cp949': { + type: '_dbcs', + table: function() { return require('./tables/cp949.json') }, + }, + + 'cseuckr': 'cp949', + 'csksc56011987': 'cp949', + 'euckr': 'cp949', + 'isoir149': 'cp949', + 'korean': 'cp949', + 'ksc56011987': 'cp949', + 'ksc56011989': 'cp949', + 'ksc5601': 'cp949', + + + // == Big5/Taiwan/Hong Kong ================================================ + // There are lots of tables for Big5 and cp950. Please see the following links for history: + // http://moztw.org/docs/big5/ http://www.haible.de/bruno/charsets/conversion-tables/Big5.html + // Variations, in roughly number of defined chars: + // * Windows CP 950: Microsoft variant of Big5. Canonical: http://www.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/WINDOWS/CP950.TXT + // * Windows CP 951: Microsoft variant of Big5-HKSCS-2001. Seems to be never public. http://me.abelcheung.org/articles/research/what-is-cp951/ + // * Big5-2003 (Taiwan standard) almost superset of cp950. + // * Unicode-at-on (UAO) / Mozilla 1.8. Falling out of use on the Web. Not supported by other browsers. + // * Big5-HKSCS (-2001, -2004, -2008). Hong Kong standard. + // many unicode code points moved from PUA to Supplementary plane (U+2XXXX) over the years. + // Plus, it has 4 combining sequences. + // Seems that Mozilla refused to support it for 10 yrs. https://bugzilla.mozilla.org/show_bug.cgi?id=162431 https://bugzilla.mozilla.org/show_bug.cgi?id=310299 + // because big5-hkscs is the only encoding to include astral characters in non-algorithmic way. + // Implementations are not consistent within browsers; sometimes labeled as just big5. + // MS Internet Explorer switches from big5 to big5-hkscs when a patch applied. + // Great discussion & recap of what's going on https://bugzilla.mozilla.org/show_bug.cgi?id=912470#c31 + // In the encoder, it might make sense to support encoding old PUA mappings to Big5 bytes seq-s. + // Official spec: http://www.ogcio.gov.hk/en/business/tech_promotion/ccli/terms/doc/2003cmp_2008.txt + // http://www.ogcio.gov.hk/tc/business/tech_promotion/ccli/terms/doc/hkscs-2008-big5-iso.txt + // + // Current understanding of how to deal with Big5(-HKSCS) is in the Encoding Standard, http://encoding.spec.whatwg.org/#big5-encoder + // Unicode mapping (http://www.unicode.org/Public/MAPPINGS/OBSOLETE/EASTASIA/OTHER/BIG5.TXT) is said to be wrong. + + 'windows950': 'cp950', + 'ms950': 'cp950', + '950': 'cp950', + 'cp950': { + type: '_dbcs', + table: function() { return require('./tables/cp950.json') }, + }, + + // Big5 has many variations and is an extension of cp950. We use Encoding Standard's as a consensus. + 'big5': 'big5hkscs', + 'big5hkscs': { + type: '_dbcs', + table: function() { return require('./tables/cp950.json').concat(require('./tables/big5-added.json')) }, + encodeSkipVals: [0xa2cc], + }, + + 'cnbig5': 'big5hkscs', + 'csbig5': 'big5hkscs', + 'xxbig5': 'big5hkscs', +}; |